Expanding mandrel for cone-winders.



No. 777,780. PATENTED DEC. 20, 1904.

R. B. BASTON.

EXPANDING MANDRELVPOR GONE WINDERS.

APPLICATION FILED FEB. 23, 1904.

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AT TY No. 777.780. PATENTED DEC. 20, 1901.

R. B. EASTON.

EXPANDING MANDREL FOR GONE WINDERS.

' APPLICATION FILED FEB. 23. 1904.

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fig W /4 4%4 AT T) yvgw UNITED STATES Patented December 20, 1964. I

PATENT OFFICE.

ROBERT B. EASTON, OF PAWTUOKET, RHODE ISLAND, ASSIGNOR TO EASTON AND BURNHAM MACHINE COMPANY, OF PAIVTUGKET,

RHODE ISLAND.

EXPANDING MANDREL FOR CONE-WINDERS- SPECIFICATION forming part of Letters Patent No. 777,780, dated December 20, 1904. Application filed February 23, 1904. Serial No. 194,952.

To all whom, it nury concern:

Be it known that I, ROBERT E. EASTON, a citizen of the United States, residing at Pawtucket, in the State of Rhode Island, have invented a new and useful Improvement in Expanding Mandrels for Cone-Winders, of which the following is a specification.

The nature of my invention consists in the improved construction of an expanding mandrel whereby the cone may be readily attached and removed and firmly held in position while the thread or yarn is being wound thereon.

In the accompanying drawings, Figure 1 represents a longitudinal section showing the mandrel with the cone attached thereto. Fig. 2 represents a side view of the mandrel without the cone. Fig. 3 represents an outer side view of the connected segments of the expanding head of the mandrel. Fig. 4 represents a section of the same, taken in the line 4 4 of Fig. 3. Fig. 5 represents the outer side view of one of the segments of the expanding head removed from the other segment. Fig. 6 represents an inner side View of the segments of the expanding head. Fig. 7 represents an edge view of the same. Fig. 8 represents a side view in which the segments of the expanding head are not connected together. Fig. 9 represents an end view of the mandrel shown in Fig. 8. i

In the drawings, A represents the arbor, to which the expanding head B is attached by means of the inclined flat springs O C, the inner ends a a of the said springs being secured to the opposite sides of the arbor A by means of the rivet Z). The expanding head B is formed of two simicircular segments 0 and d, the connecting ears 6 and c of which are loosely secured to each other by means of the slots ff, made in the ears 6 e of the segment a, and

the screws g g, which are secured into the ears 0 e of the opposite segment (Z, the said ears being made to overlap each other, as shown in Figs. 4 and 7. The semicircular segments 0 and (Z are provided at their inner sides with a projecting flange h, to which the spring C is secured by means of the rivet a, the outer end of which is prolonged beyond the side of the segment to form the spur 7, which by engagement with the inner surface of the cone D serves to hold the cone firmly upon the mandrel, the outer surface of the segment also engaging with the inner surface of the cone.

The semicircular segments 0 and (Z are forced inward toward each other by the action of the springs O O and are carried outward against the action of the said springs by means of the conical surface 10 of the nut E, which is held upon the arbor A by means of the screwthread Z, and by screwing the nut E back and forth upon the arbor A the head A may be either contracted or expanded, as desired, for either attaching or removing the cone D. The forward end of the arbor A is provided with the conical surface an, adapted to fit the inner surface of the small end of the cone. The nut E is preferably provided with a knurled flange n, by means of which it may be turned to either secure or release the cone D, the backward unscrewing movement of the nut serving-to release the cone for its ready removal from the mandrel and the reverse screwingup movement of the nut serving to force the semicircular segments 0 and (Z outward against 'the reverse inward action of the springs to hold the cone securely. The segments instead of being connected together by means of the slots f and screws 9 may be made separate and disconnected from each other in carrying out my invention, as shown by the segments 0 and cl in Figs. 8 and 9.

The expanding head B should properly form a true circle when in its extreme expanded condition, and its outer surface 0 is made conical to properly fit the inner conical surface of the cone.

I claim as my invention- 1. In an expanding mandrel, the combination of the arbor, the inwardly-acting springs attached to the arbor, and the segments'at tached to the springs, with the conical nut for causing the outward movement of the segments, substantially as described.

2. In an expanding mandrel, the combination of the arbor, the inwardly-acting springs attached to the arbor, and the segments loosely connected with each other and attached to the arbor, and the comically-formed segments at- 0 springs, with the conical nut for causing the tached t0 the springs, with the conical nut outward movement of the expansible head, for forcing the segments outward against the formed by the loosely-connected segments, inward action of the springs, substantially as substantially as described. described.

3. In an expanding mandrel, the combina- ROBERT E. EASTON. tion of the arbor provided with a conical sur- Witnesses: face adapted to fit the smaller end of the cone, SooRA'rEs SCHOLFIELD, the inwardly-acting springs secured to the ANDREW J. PITOHER, 

